10 Smartest Demon Slayer Characters, Ranked

Demon Slayer is one of the most popular modern anime series to exist and although most of the credits go to Ufotbale’s stellar anime adaptation, the diverse and compelling cast of characters is also a significant factor in its success. On his journey to turn his sister back into a human, Tanjiro meets a host of characters who help him grow as a demon slayer. In this limited time, each character manages to leave a lasting impact on the series.

Although the emotional backstories of both demons and humans are a highlight, Some Demon Slayer Characters stand out due to their exceptional intelligence and strategy. Since demons are superior in strength and abilities, the survival of the demon slayers hinges on their ability to make quick and smart decisions. As said, the spirits themselves are far from lacking in intelligence. Demon Slayer Does an excellent job of balancing both sides, with certain characters shining more brightly when it comes to their wit and ingenuity.

10

Kokushibo

The strongest upper moon is filled with battle knowledge

The upper moon one is one of the oldest beings in Demon Slayer And with age the demon gathered great knowledge. This is clearly evident when Kokushibo overpowers not one but multiple Hashiras at once in some of Infinity Castle’s best action scenes. Kokushibo’s battle expertise stems from a lifetime of relentless training and honing his skills, solidifying him as a formidable warrior.

While his mastery of combat and the development of his unique breathing style are testaments to his intelligence, Kokushibo’s overconfidence becomes his downfall. His decision to abandon humanity in pursuit of greater power, rather than use his knowledge for good, ironically highlights that one of Kokushibo’s greatest flaw is his lack of intelligence.

9

Kiria Ubuyashiki

In a limited time, the new successor to Ubuyashiki proved his inherent knowledge

The heads of the Obuyashiki family are placed as the leaders of the songs and lead them against Muzan. After the death of the elder Ubuyashiki in an attempt to kill Muzan, Kiriya Ubuyashiki steps into this role and quickly proves his ability by leading the demon slayers through their final battle against Muzan and his minions, highlighting the inherent brilliance of the Ubuyashiki bloodline.

Kirya plays a very crucial role in the Infinity Castle and if it wasn’t for him, the success of the Demon Slayers would be in jeopardy. Despite being new to the job and under pressure, Kiria seamlessly aids others in their battle. Had he been given a more extended role in the series, his intelligence would have easily outshined many.

8

Giyu Tomioka

Only Hashira to further improve his breathing form

Each demon slayer uses a breathing technique, typically consisting of ten forms. But the current water flow, Giyu Tomioka, stands out as the only known Hashira to expand on his inherited water breathing style by developing an eleventh form. Although the exact process of how Tomioka achieved this is unexplored, the creation of this technique subtly highlights his intelligence.

Guy’s intellect is further emphasized by his analytical approach to combat, as he assesses his opponents carefully, never underestimating them. This methodical mindset not only sets him apart from his peers but also arguably positions him as one of the most strategic and intelligent characters in Demon Slayer.

7

Yoreichi Tsugikuni

The creator of these breathing styles is the pinnacle of demon slayers

Upper Moon One’s twin brother, Yoriichi, represents all the best things about Kokushibo and elevates it one step further through his prodigious natural talent. While Kokushibo spends his entire life – and afterlife – honing his skills, he still falls short of his brother’s incredible prowess. Yoriichi is the creator of the sun-breathing style, the original technique from which all other breathing styles are derived.

From his various encounters with Muzan, Yoreichi was able to further develop his breathing technique, which essentially led to the development of the 13th Form, which was created to kill Muzan. The feat alone is remarkable and speaks to Yoriichi’s unparalleled skill. He represents the absolute pinnacle a demon slayer can reach, showing not only his immense talent but his intelligence as well. and strategic brilliance in the fight against demons.

6

Gyomei Himejima

The strongest Hashira is also one of the smartest Hashira

Gyomei Himejima, the strongest of Demon Slayer’s Hashira, is also the most admired character of the series after Kagay Ubyuashiki, for his innate leadership qualities and intelligence. Unlike other demon slayers, Gyomei is never shown to lose his composure and displays a calm presence during his battle against the demons.

Gyomei was also among the first to come up with a crucial strategy for defeating MuzanRecognize that the survival of the demon was based on the possession of multiple vital organs, which all needed to be destroyed simultaneously. This revelation showcases his exceptional insight and quick thinking on the battlefield. However, it is tragic how Giomei’s intelligence stems from a poignant incident.

5

Shinobu Kocho

Although Shinobu lacks physical prowess, she makes up for it with her intelligence

Shinobu’s initial image would suggest that she is lighthearted and mischievous among the Hashira, but her analytical mind and intelligence arguably surpass those of her peers. Shinobu clearly lacks physical prowess but makes up for it with her wit, which is evident from her breathing style. While Giyu was able to create an additional form to his breathing style, Shinobu developed a complete breathing style to flawlessly overcome her lack of strength.

Her extensive knowledge of poisons and medicine is equally remarkable, allowing her to kill demons efficiently and save countless lives. This expertise proved crucial in the Demon Slayer’s Final battle against Muzan, where her contributions not only aided in his defeat, but also prevented Tanjiro from becoming a demon that could conquer the sun, cementing her position as the smartest Hashira of the Demon Slayer.

4

Muzan Kibutsuji

Muzan also possesses the crucial trait of a great villain: smartness

Having lived more than a thousand years, There is no doubt that Muzan is flooded with information that no one else has. As the sole creator of demons and the first in series history, he was responsible for shaping thousands of variations, each with unique abilities. His expertise extends beyond just biology as he is also a master of chemistry, stealth and manipulation, all of which he uses to further his goals.

With a highly strategic mind, Muzan consistently stayed one step ahead of the Demon Slayer Corps for centuries, always evading their grasp. Consider how Muzan even possesses five minds, his intellect is mathematically five times better than that of a normal person. Therefore, it is all the more satisfying to see the end of Muzan’s reign with the power of the slayers of demons, which has been harnessed by thousands for centuries.

3

Tamayo

The most intelligent demon

Tamayo is the only demon in the series whose intellect exceeds that of MuzanThe creator of all demons. Living for centuries, Tamayo was able to harness her scientific knowledge to a level that helped her reverse the process of becoming a demon, helping many regain their humanity and break free of Muzan’s control.

However, her deep work lies in developing the poison that severely weakens both Musan and Doma, which is pivotal in ensuring the Demon Slayer Corps’ final victory. Each of Tamayo’s contributions highlights her incredible intelligence and her essential role in the downfall of the Demon King.

2

Kagaya Ubuyashiki

Kagaya is intentionally crafted to be the smartest character in Demon Slayer

Kagaya Ubuyashiki’s role in Demon Slayer is easily missed as he is absent from the battlefield. Still, he plays the most crucial role in the series: guiding the Demon Slayers Corps against demons. He has impressive insights, which enabled him to make the best use of demon slayers in the most critical situations to minimize losses. What sets Kagaya apart, however, is his remarkable ability to see people for what they truly are, earning him the deep respect and admiration of those he leads.

Furthermore, it is revealed that Kagaya possesses the gift of foresight, a power passed down through the Ubuyashiki family. The ability to predict outcomes proved vital, as it allowed him to develop the trap that weakened Musan at the start of the final battle. Kagaya’s unique blend of empathy, foresight, and strategic brilliance highlights that he was intentionally crafted to be the smartest character of Demon Slayer.

1

Tanjiro Kamado

The protagonist of Demon Slayer Has consistently shown relatable intelligence

Tanjiro Kamado, the protagonist of Demon SlayerGrows increasingly strategic and intelligent as the series progresses, finally becoming one of Demon Slayer’s Strongest letters. However, what truly distinguishes Tanjiro from others is his deep sense of maturity, a quality rarely found in someone so young. Despite being in his mid-teens, he exudes a warmth and wisdom that surpasses his years, a trait tragically forged by the loss of his family.

This maturity is shown most strongly early in the series when Tanjiro comforts Kazumi, who is devastated by the loss of his fiancee. While anyone could have offered words of encouragement, Tanjiro’s gentle and empathetic delivery makes his message deeply impactful. His ability to comfort and inspire others, even in the face of his own suffering, sets him apart. Combined with his growing battle intelligence, adaptability and compassionate nature, Tanjiro Kamado stands out as one of the smartest and most emotionally intelligent characters in Demon Slayer.